
<table style="text-align:center"><caption><strong>Table 1. Descriptive Statistics</strong></caption>
<tr><td colspan="7" style="border-bottom: 1px solid black"></td></tr><tr><td style="text-align:left">Statistic</td><td>N</td><td>Mean</td><td>Median</td><td>St. Dev.</td><td>Min</td><td>Max</td></tr>
<tr><td colspan="7" style="border-bottom: 1px solid black"></td></tr><tr><td style="text-align:left">concrete</td><td>233,004</td><td>0.708</td><td>1</td><td>0.455</td><td>0</td><td>1</td></tr>
<tr><td style="text-align:left">action</td><td>233,004</td><td>0.461</td><td>0</td><td>0.499</td><td>0</td><td>1</td></tr>
<tr><td style="text-align:left">resolved</td><td>233,004</td><td>0.150</td><td>0</td><td>0.357</td><td>0</td><td>1</td></tr>
<tr><td style="text-align:left">complaint</td><td>233,004</td><td>0.375</td><td>0</td><td>0.484</td><td>0</td><td>1</td></tr>
<tr><td style="text-align:left">post_length</td><td>233,004</td><td>184.231</td><td>151</td><td>139.110</td><td>9</td><td>1,795</td></tr>
<tr><td style="text-align:left">phone</td><td>233,004</td><td>0.392</td><td>0</td><td>0.488</td><td>0</td><td>1</td></tr>
<tr><td style="text-align:left">male</td><td>228,518</td><td>0.936</td><td>1</td><td>0.244</td><td>0</td><td>1</td></tr>
<tr><td style="text-align:left">age</td><td>228,381</td><td>55.475</td><td>56</td><td>2.952</td><td>44</td><td>62</td></tr>
<tr><td style="text-align:left">han_race</td><td>228,028</td><td>0.956</td><td>1</td><td>0.205</td><td>0</td><td>1</td></tr>
<tr><td style="text-align:left">edu_shuangyiliu_bin</td><td>228,518</td><td>0.197</td><td>0</td><td>0.398</td><td>0</td><td>1</td></tr>
<tr><td style="text-align:left">edu_phd</td><td>228,518</td><td>0.274</td><td>0</td><td>0.446</td><td>0</td><td>1</td></tr>
<tr><td style="text-align:left">tenure_length_m</td><td>233,004</td><td>25.162</td><td>19</td><td>22.463</td><td>0</td><td>120</td></tr>
<tr><td style="text-align:left">pop_log</td><td>222,604</td><td>6.180</td><td>6.250</td><td>0.671</td><td>3.045</td><td>7.536</td></tr>
<tr><td style="text-align:left">gdp_pc_log</td><td>222,726</td><td>11.075</td><td>11.019</td><td>0.467</td><td>9.766</td><td>12.293</td></tr>
<tr><td style="text-align:left">revenue_log</td><td>224,200</td><td>14.668</td><td>14.512</td><td>1.105</td><td>11.229</td><td>17.567</td></tr>
<tr><td style="text-align:left">replied_days</td><td>233,004</td><td>34.606</td><td>22</td><td>45.791</td><td>0</td><td>681</td></tr>
<tr><td style="text-align:left">reply_length</td><td>233,004</td><td>302.190</td><td>244</td><td>245.577</td><td>20</td><td>15,729</td></tr>
<tr><td style="text-align:left">normalized_negative_score</td><td>233,004</td><td>0.066</td><td>0.054</td><td>0.065</td><td>0.000</td><td>1.000</td></tr>
<tr><td style="text-align:left">subject_citizenship</td><td>233,004</td><td>0.223</td><td>0</td><td>0.416</td><td>0</td><td>1</td></tr>
<tr><td style="text-align:left">legal_citizenship</td><td>233,004</td><td>0.187</td><td>0</td><td>0.390</td><td>0</td><td>1</td></tr>
<tr><td style="text-align:left">socialist_citizenship</td><td>233,004</td><td>0.320</td><td>0</td><td>0.467</td><td>0</td><td>1</td></tr>
<tr><td style="text-align:left">protest_risk</td><td>233,004</td><td>0.413</td><td>0</td><td>0.492</td><td>0</td><td>1</td></tr>
<tr><td style="text-align:left">from_hotline12345</td><td>233,004</td><td>0.031</td><td>0</td><td>0.173</td><td>0</td><td>1</td></tr>
<tr><td colspan="7" style="border-bottom: 1px solid black"></td></tr></table>
